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#ectotherm

2 public questions tagged with this topic.

Adaptation

Animals that cannot regulate body temperature are called:

Poikilotherms show substantial variation in body temperature, usually because environmental heat strongly influences them. Most fishes, amphibians, reptiles, and invertebrates fit this description. “Poikilothermic” is often paired with “ectothermic,” but the terms are not identical: ectothermy refers to the primary source of heat, whereas poikilothermy refers to variability in body temperature. These animals may regulate temperature behaviourally by basking, seeking shade, changing posture, burrowing, or moving between water layers, so saying that they cannot regulate temperature at all is an

Ref: Evolutionary Analysis, Herron & Freeman, 5th Ed., Ch. 10

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Ecosystem Ecology

Correct about ectotherm and endotherm efficiency:

The keyed combination is A and C, yet the underlying assertions A–D are missing. In general, ectotherms spend relatively little assimilated energy maintaining a constant high body temperature and often show greater production efficiency than endotherms. Endotherms have high respiratory costs for thermoregulation, although assimilation efficiency also depends strongly on food quality and digestive physiology. These accepted principles support comparison of efficiencies, but they cannot establish which absent lettered statements correspond to them. Reliable inference requires the complete experi

Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 17-19

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